Structural-steel framework



Sept. 3, 1929. J. A. LARKIN 1,726,344

STRUCTURAL STEEL FRAMEWORK Filed May 10, 1927 I J My j j INVENTORWWNESSES fag/z .illalfil z ATTORN EY Patented Sept. 3, 1929.

UNITEDASTATES JOHN ANDREW LARKIN, OF NEW YORK, N. Y.

STRUCTURAL-STEEL FRAMEWOBK.

Application filed May 10, 1927. Serial No. 190,299.

This invention relates to structural steel framework for buildingconstruction, and has particular reference to a framework employing incombination with certain groups of main columns, supplemental columns soarranged and connected with the main columns as to assume a part of thegravity load usually supported by the main columns, and this withoutreceiving wind loads or stresses to which the main columns aresubjected.

Theinvention comprehends the employment of supplemental columns inconjunction with certain groups of main columns for partially supportinga building area gravity load in order to relieve the main columns ofaportion of the gravity load and to lend to the main columns, a greaterwind stress capacity than could otherwise be sustained on a given area,thereby allowing the main columns of a structure to be erected to agreater height than heretofore possible.

The invention furthermore comprehends a supplemental column for use in astructural steel framework for buildings for supporting a portion of thebuilding area gravity load by relieving a part of the gravity loadusually supported by the main columns of the building to permit agreater proportion of the sectional area of the main columns sosupplemented, to become effective for resisting wind stresses.

As a further object of the invention embodies the use of supplementalcolumns employed to support a part of a building area gravity load,which by relieving part of the gravity load usually supported by themain columns of the building, permits the main columns having themaximum sectional area assembled by the use of rivets, having maximumlegal grips, thus enabling, due to the use of a greater proportion ofsuch maximum sectional area for resisting wind stresses, the effectiveerection of main columns to a greater height and consequently theerection of buildings of greater heights.

More specifically the invention comprehends a structural steel frameworkfor buildings including a supplemental column disposed between a groupof main columns out of alinement with the webs or flanges of the maincolumns or in diagonal relation thereto and indirectly connected to saidmain columns.

The invention further aims to provide an improvement in a structuralsteel framework for buildings which does not materially increase thecost of erection and which is thoroughly reliable and highly efficientin its purpose.

lVith the above recited and other objects in view, reference is had tothe following description and accompanying drawings in which there isexhibited one example or embodiment of the invention, while the appendedclaims define the actual scope of the invention.

In the drawing, the figure is a diagrammatic plan view illustrating thearrangement of a group of main columns and a supplemental column inaccordance with the invention.

Referring to the drawings by characters of reference, A indicates themain columns which are directly connected to each other by girders B inany approved manner so that the webs and flanges of the main columns arein alinement. Associated with a group of main columns is a supplementalcolumn C which is placed diagonally between the group of main columns,with the webs or flanges of said supplemental column out of directalinement with the webs and flanges of the main columns. Thesupplemental column C is indirectly connected to the main columns bybeams D, which beams are connected to and extend from the supplementalcolumn to the girders B to which they are connected so that saidsupplemental column may support a part of the building area gravity loadto relieve the main columns of said part of the load, whereby said maincolumns are given a greater wind stress capacity than could otherwise bepermitted on a given sectional area. This obviously permits the maincolumns of the structure to be erected to a greater height. It shouldalso be noted that the supplemental column is so located and indirectlyconnected with the main columns that no wind load or stress is impartedthereto, it functioning merely to assist in supporting the building areagravity load.

It thus follows that by providing a supplemental column employed solelyfor the purpose of supporting a part of the building area gravity loadthus relieving the main columns of the building of such part of thegravity load which is usually supported thereby, allows the said maincolumns having the maximum sectional area assembled by the use ofrivets, to have maximum legal the distance between the under. side .ofboth rivet heads or the actual length of the rivetv r shank or stockactually gripping the metal.)

By permitting the useof a greater proportion of such maximum sectionalareafor re; sisting wind stresses, it is obvious that the effectiveerection of the main columns to a greater height is enabled and,consequently, the erection ofbuildings to greater heights is providedfor.

What is claimed is:

1. In a structural steel framework for buildings, a group of maincolumns, a supplemental column disposed therebetween, main girdersconnecting saidmain columns, and beams uniting said supplemental columnand main girders.

2. In a structural steel framework for buildings, a group of maincolumns symmetrically arranged, a supplemental column disposedtherebetween and equi-distant from said main columns, main girdersconnecting said main columns and beams uniting said supplemental columnand said main girders.

3.- In a structural steel framework for buildings, a group of maincolumns, a supplemental column of relatively small weight and crosssection as compared with said main column, said supplemental columnbeing disposed within the group of main columns, main girders connectingsaid main columns,

and means for connecting said supplemental column to said main girders4-. A; structural' steel framework unit for buildings comprising a groupof main columns, girders .connepting said main columns together, saidmain columns and said girders beingadapted to resist gravity load andwind stresses, a supplemental column associated Withsaidimairncolumnsand adapted to relieve said main columns of a portion of the gravityload, andconnections for maintaining said supplemental column inlfixedspaced relation with said mailr column while preventingthesupplementalcolumn from being subject-to Wind stresses.

5-. In astructural. steel framework for buildings, a group ofmaincolumns arranged to form a square, girdersvconnecting said main columns,a supplemental column disposed centrallyof the square, and connectionsfromsaid supplemental column to each of said. girders.

6'. In a structural steel framework for buildings, a group ofmaincolumns arranged to form a square, girders connecting said main columns,a. supplemental column of smaller cross section and weightthan any ofsaid main columns, said supplemental column being disposed at the centerof the square, and connectionsextending from said supplemental columnperpendicularly to each of said girders.

i J LARKIN,

